公开(公告)号：US11209297B2

公开(公告)日：2021-12-28

申请号：US15236650

申请日：2016-08-15

Applicant: Texas Instruments Incorporated

Inventor： Amardeep Sathyanarayana ,  David P. Magee ,  Anand G. Dabak ,  Srinath M. Ramaswamy

IPC: G01S15/10 ,  G01F1/66

Abstract: A transducer system with a transducer and circuitry for applying a waveform to excite the transducer during an excitation period. The applying circuitry also comprises circuitry for changing a frequency of the waveform during the excitation period.

公开(公告)号：US20170115255A1

公开(公告)日：2017-04-27

申请号：US15236666

申请日：2016-08-15

Applicant: Texas Instruments Incorporated

Inventor： Amardeep Sathyanarayana ,  David P. Magee ,  Anand G. Dabak ,  Srinath M. Ramaswamy

IPC: G01N29/34 ,  G01N29/36

CPC classification number: G01N29/348 ,  G01F1/662 ,  G01F1/667 ,  G01F25/0007 ,  G01N29/024 ,  G01N29/11 ,  G01N29/12 ,  G01N29/30 ,  G01N29/326 ,  G01N29/343 ,  G01N29/345 ,  G01N29/346 ,  G01N29/36 ,  G01N29/4454 ,  G01N29/50 ,  G01N2291/011 ,  G01N2291/014 ,  G01N2291/02836 ,  G01N2291/044 ,  G01P5/245

Abstract: A transducer system. The system comprises a transducer and circuitry for applying an excitation waveform to excite the transducer during an excitation period. The circuitry for applying has: (i) circuitry for applying a first waveform at a first frequency; and (ii) circuitry for applying a second waveform at a second frequency differing from the first frequency.

公开(公告)号：US20150330831A1

公开(公告)日：2015-11-19

申请号：US14712658

申请日：2015-05-14

Applicant: Texas Instruments Incorporated

Inventor： Amardeep Sathyanarayana ,  Nitish Murthy ,  Sourabh Ravindran ,  Brian Paul Burk

IPC: G01H13/00

CPC classification number: G01H3/08 ,  G01H1/00 ,  G01H13/00

Abstract: A method and apparatus for determining properties of at least one of a surface or materials adjacent to a portable device. The method includes windowing a segment of the received signal to remove an edge transients, computing the FFT power spectral density of the signal, determining a peak in the spectral energy at a frequency, finding local peaks by determining the difference in the signal amplitude is relation to a pre-determined threshold, and computing harmonic energy according to the local peaks and the difference and determining at least one property of the surface or material.

Abstract translation: 一种用于确定与便携式设备相邻的表面或材料中的至少一个的属性的方法和装置。 该方法包括：对接收到的信号进行加窗以去除边缘瞬变，计算信号的FFT功率谱密度，确定频谱中的频谱能量的峰值，通过确定信号幅度差异来找到局部峰值关系 根据局部峰值和差值计算谐波能量，并确定表面或材料的至少一个性质。

公开(公告)号：US12038314B2

公开(公告)日：2024-07-16

申请号：US17563227

申请日：2021-12-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Amardeep Sathyanarayana ,  David P. Magee ,  Anand G. Dabak ,  Srinath M. Ramaswamy

IPC: G01S15/10 ,  G01F1/667

CPC classification number: G01F1/667 ,  G01S15/104 ,  G01S15/107

Abstract: A transducer system with a transducer and circuitry for applying a waveform to excite the transducer during an excitation period. The applying circuitry also comprises circuitry for changing a frequency of the waveform during the excitation period.

公开(公告)号：US10444203B2

公开(公告)日：2019-10-15

申请号：US15374802

申请日：2016-12-09

Applicant: Texas Instruments Incorporated

Inventor： Leonard William Estevez ,  David Patrick Magee ,  Amardeep Sathyanarayana

IPC: G01N29/46 ,  G01N29/07 ,  G01N29/44 ,  G01N29/11

Abstract: Mechanical vibration may be sensed by a remotely located ultrasonic sensor. An ultrasonic wave may be transmitted from a transmitter to a vibrating surface, in which the transmitter is separated from the vibrating surface by a distance. A reflected portion of the ultrasonic wave that is reflected from the vibrating surface may be received by a receiver that is also separated from the vibrating surface by a distance. A measure of phase shift amplitude in the reflected portion of the ultrasonic wave may be determined and converted into an amplitude of a vibration of the vibrating surface.

公开(公告)号：US10378938B2

公开(公告)日：2019-08-13

申请号：US14852005

申请日：2015-09-11

Applicant: Texas Instruments Incorporated

Inventor： Anand Dabak ,  Amardeep Sathyanarayana ,  Luis Fernando Reynoso ,  Venkataramanan Ramamurthy

IPC: H04B11/00 ,  G01F1/66 ,  G01F1/712

Abstract: A transducer system with a transducer and circuitry for applying a pulse train to excite the transducer. The circuitry for applying a pulse train selects a first set having a first number of pulses at a first frequency and a second set of pulses having a second number of pulses at a second frequency differing from the first frequency. At least one pulse from the first set is located in the pulse train between one or more of the pulses at the second frequency.

公开(公告)号：US10006791B2

公开(公告)日：2018-06-26

申请号：US14862832

申请日：2015-09-23

Applicant: Texas Instruments Incorporated

Inventor： R Venkata Ramanan ,  Anand Dabak ,  Amardeep Sathyanarayana

IPC: G01F25/00 ,  G01F1/66

CPC classification number: G01F1/667 ,  G01F25/0007

Abstract: A method, system and apparatus is disclosed for auto-tuning a circuit associated with an upstream transducer (UPT) and a circuit associated with a downstream transducer (DNT) for reciprocal operation in an ultrasonic flowmeter. The method includes exchanging signals between the upstream transducer and the downstream transducer; comparing at least one of respective maximum amplitudes of an upstream signal and a downstream signal and respective center frequencies of a Fast Fourier Transform (FFT) of the upstream signal and the downstream signal; and responsive to determining that at least one of the respective maximum amplitudes and the respective center frequencies do not match, correcting the mismatch.

公开(公告)号：US09880046B2

公开(公告)日：2018-01-30

申请号：US14712658

申请日：2015-05-14

Applicant: Texas Instruments Incorporated

Inventor： Amardeep Sathyanarayana ,  Nitish Murthy ,  Sourabh Ravindran ,  Brian Paul Burk

IPC: G01H1/00 ,  G01H13/00 ,  G01H3/08

CPC classification number: G01H3/08 ,  G01H1/00 ,  G01H13/00

Abstract: A method and apparatus for determining properties of at least one of a surface or materials adjacent to a portable device. The method includes windowing a segment of the received signal to remove an edge transients, computing the FFT power spectral density of the signal, determining a peak in the spectral energy at a frequency, finding local peaks by determining the difference in the signal amplitude is relation to a pre-determined threshold, and computing harmonic energy according to the local peaks and the difference and determining at least one property of the surface or material.

公开(公告)号：US20170082471A1

公开(公告)日：2017-03-23

申请号：US14862832

申请日：2015-09-23

Applicant: Texas Instruments Incorporated

Inventor： R. Venkata Ramanan ,  Anand Dabak ,  Amardeep Sathyanarayana

IPC: G01F1/66

CPC classification number: G01F1/667 ,  G01F25/0007

Abstract: A method, system and apparatus is disclosed for auto-tuning a circuit associated with an upstream transducer (UPT) and a circuit associated with a downstream transducer (DNT) for reciprocal operation in an ultrasonic flowmeter. The method includes exchanging signals between the upstream transducer and the downstream transducer; comparing at least one of respective maximum amplitudes of an upstream signal and a downstream signal and respective center frequencies of a Fast Fourier Transform (FFT) of the upstream signal and the downstream signal; and responsive to determining that at least one of the respective maximum amplitudes and the respective center frequencies do not match, correcting the mismatch.